Several tools for writing (in English). Story idea generator, conflict generator, word count meter, readability analyzer, half title generator, cliche buster.
Learning management system that gives students quizzes on grammar and easily confused words. Teachers can track student progress.
Grammar questions include content based on students' indicated interests.
Intended for native speakers, but may also be useful for ESL.
Annotate texts online using colored highlighters, text comments, and tags. Collaborate with other users and groups. Requires creating a free account to share the texts.